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App Inventor 2 图片缩放并返回Base64文本 - App应用开发 - 清泛IT社区，为创新赋能！
图片缩放并Base64化 参考代码如下：（注：图片可拖动至编程区，自动还原代码块）
参考用法如下：
其中，用到的SimpleBase64拓展，点此查看。其中，用到的TaifunImage拓展，点此查看。
来源中文文档：https://www.fun123.cn/reference/ ......
解决：文本输入框在键盘弹起输入框看不见时，键盘退格键删除不了内容？ - A...
是因为区域隐藏了导致的。
screen1 的属性 “允许滚动” 勾选上，完美解决：
允许滚动后，区域就是自动的，输入框永远在视线内，键盘响应全部正常。
用户反馈文本输入框光标问题 - 用户反馈 - 清泛IT社区，为创新赋能！
还有一个问题，我用老巫婆那个网站 和现在的同样工程对比如下 ： 1、老巫婆光标会自动退出 2、老巫婆串口通信350MS一次 不会死机 现在的1000MS 才不会死机.
感觉使用起来， 没有他那个网站好...
PHP PDO: charset, set names?
...e it in your connection string like:
"mysql:host=$host;dbname=$db;charset=utf8"
HOWEVER, prior to PHP 5.3.6, the charset option was ignored. If you're running an older version of PHP, you must do it like this:
$dbh = new PDO("mysql:$connstr", $user, $password);
$dbh->exec("set names utf8");
...
Converting string to byte array in C#
...
@AndiAR try Encoding.UTF8.GetBytes(somestring)
– OzBob
Dec 5 '16 at 4:24
1
...
Use of 'use utf8;' gives me 'Wide character in print'
...
Without use utf8 Perl interprets your string as a sequence of single byte characters. There are four bytes in your string as you can see from this:
$ perl -E 'say join ":", map { ord } split //, "鸡\n";'
233:184:161:10
The first thre...
Serializing an object as UTF-8 XML in .NET
...();
var streamWriter = new StreamWriter(memoryStream, System.Text.Encoding.UTF8);
serializer.Serialize(streamWriter, entry);
byte[] utf8EncodedXml = memoryStream.ToArray();
I've left out the same disposal you've left. I slightly favour the following (with normal disposal left in):
var serialize...
Determine a string's encoding in C#
...
Check out Utf8Checker it is simple class that does exactly this in pure managed code.
http://utf8checker.codeplex.com
Notice: as already pointed out "determine encoding" makes sense only for byte streams. If you have a string it is al...
UTF-8 all the way through
...
Data Storage:
Specify the utf8mb4 character set on all tables and text columns in your database. This makes MySQL physically store and retrieve values encoded natively in UTF-8. Note that MySQL will implicitly use utf8mb4 encoding if a utf8mb4_* col...
#1071 - Specified key was too long; max key length is 1000 bytes
...lumn2, column3, column4, column5, column6)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
UTF8 is multi-bytes, and key length is calculated in this way - 500 * 3 * 6 = 9000 bytes.
But note, next query works!
CREATE TABLE IF NOT EXISTS test_table1 (
column1 varchar(500) NOT NULL,
column2 varchar(500) ...